Since "Xenogears" is a classic RPG with a notoriously complex development history and a dedicated speedrunning/cheat community, a "paper" on this topic usually takes the form of a technical analysis or a retrospective guide.
Because Xenogears has a passionate but niche community, official code repositories are better than random forum posts: xenogears gameshark codes
3006ECAC 00XX (Replace XX with enemy hex ID – e.g., 01 for Gears)Xenogears GameShark Codes: Where to Find Them Since "Xenogears" is a classic RPG with a